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Panic log in the end. I check the registers and source c= ode. static inline struct obj_cgroup *__folio_objcg(struct folio *folio) = =20 { = =20 unsigned long memcg_data =3D folio->memcg_data; = =20 = =20 VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); = =20 VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); = =20 VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); = =20 = =20 return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); = =20 } =20 the memcg_data is 0xffff in register x1. This seems a invalid value. Register x0 is x1 & ~3. The panic happens in the PC: ffff800080305894, which is 'ldr x0, [x0, #= 16]' I not have an good idea on how to fix the issue, please suggest if you have= time to give a look. [ 12.843675] Unable to handle kernel paging request at virtual address 00= 0000000001000c [ 12.849981] audit: type=3D1334 audit(1709988536.322:30): prog-id=3D3 op= =3DUNLOAD [ 12.857888] Mem abort info: [ 12.867630] ESR =3D 0x0000000096000004 [ 12.871368] EC =3D 0x25: DABT (current EL), IL =3D 32 bits [ 12.876675] SET =3D 0, FnV =3D 0 [ 12.879732] EA =3D 0, S1PTW =3D 0 [ 12.882860] FSC =3D 0x04: level 0 translation fault [ 12.887730] Data abort info: [ 12.890599] ISV =3D 0, ISS =3D 0x00000004, ISS2 =3D 0x00000000 [ 12.896076] CM =3D 0, WnR =3D 0, TnD =3D 0, TagAccess =3D 0 [ 12.901120] GCS =3D 0, Overlay =3D 0, DirtyBit =3D 0, Xs =3D 0 [ 12.906424] user pgtable: 4k pages, 48-bit VAs, pgdp=3D00000001008de000 [ 12.912854] [000000000001000c] pgd=3D0000000000000000, p4d=3D00000000000= 00000 [ 12.919642] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP [ 12.925900] Modules linked in: [ 12.928942] CPU: 4 PID: 131 Comm: kworker/4:2 Not tainted 6.6.23-06226-g= 41e0f501b547-dirty #248 [ 12.937625] Hardware name: NXP i.MX95 19X19 board (DT) [ 12.942748] Workqueue: events bpf_prog_free_deferred [ 12.947713] pstate: 40400009 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE= =3D--) [ 12.954663] pc : vfree+0x114/0x2e0 [ 12.958060] lr : vfree+0x78/0x2e0 [ 12.961362] sp : ffff80008459bd10 [ 12.964664] x29: ffff80008459bd10 x28: 0000000000000000 x27: 00000000000= 00000 [ 12.969128] watchdog: watchdog0: watchdog did not stop! [ 12.971788] x26: 0000000000000000 x25: ffff0000808b5a00 x24: ffff0000800= 90805 [ 12.971795] x23: ffff000084bcdc08 x22: 0000000000000000 x21: ffff0000849= 3c6c0 [ 12.971802] x20: fffffc000100005e x19: 0000000000000000 x18: 00000000000= 00000 [ 12.971808] x17: ffff800084ec1000 x16: ffff00008465f208 [ 12.991063] systemd-shutdown[1]: Using hardware watchdog 'i.MX7ULP watch= dog timer', version 0, device /dev/watchdog0 [ 12.991246] x15: 0000000000000000 [ 13.017453] x14: 0000000000000000 x13: ffff80008f001000 x12: ffff0000846= 47a00 [ 13.024577] x11: ffff000080b9d1f8 x10: ffff0000846479d8 x9 : ffff8000803= 057f8 [ 13.031701] x8 : ffff80008459bcf0 x7 : 0000000000000001 x6 : ffff800082b= 84d38 [ 13.038825] x5 : 0000000000000000 x4 : 0000000080000000 x3 : ffff8000837= 7d000 [ 13.045949] x2 : 0000000000000001 x1 : 000000000000ffff x0 : 00000000000= 0fffc [ 13.047210] systemd-shutdown[1]: Watchdog running with a timeout of 1min= . [ 13.053073] Call trace: [ 13.053076] vfree+0x114/0x2e0 [ 13.053083] bpf_jit_free+0x54/0xb8 [ 13.068804] bpf_prog_free_deferred+0x16c/0x1a0 [ 13.073328] process_one_work+0x148/0x3b8 [ 13.077332] worker_thread+0x32c/0x450 [ 13.081076] kthread+0x11c/0x128 [ 13.084300] ret_from_fork+0x10/0x20 [ 13.087874] Code: a9425bf5 a8c57bfd d50323bf d65f03c0 (f9400800) Part of the objdump code: ffff8000803057f4: 97f8c73d bl ffff8000801374e8 <__rcu_rea= d_lock> =20 ffff8000803057f8: f9400681 ldr x1, [x20, #8] = =20 ffff8000803057fc: d1000420 sub x0, x1, #0x1 = =20 ffff800080305800: f240003f tst x1, #0x1 = =20 ffff800080305804: 9a941000 csel x0, x0, x20, ne // ne =3D = any =20 ffff800080305808: f9401c01 ldr x1, [x0, #56] = =20 ffff80008030580c: 927ef420 and x0, x1, #0xfffffffffffffffc= =20 ffff800080305810: 37080421 tbnz w1, #1, ffff800080305894 =20 ffff800080305814: b40000e0 cbz x0, ffff800080305830 =20 ffff800080305818: d53b4236 mrs x22, daif = =20 ffff80008030581c: d50343df msr daifset, #0x3 = =20 ffff800080305820: 12800002 mov w2, #0xffffffff = // #-1 =20 ffff800080305824: 528005c1 mov w1, #0x2e = // #46 =20 ffff800080305828: 94015eac bl ffff80008035d2d8 <__mod_mem= cg_state> =20 ffff80008030582c: d51b4236 msr daif, x22 = =20 ffff800080305830: 97f8eafa bl ffff800080140418 <__rcu_rea= d_unlock> =20 ffff800080305834: aa1403e0 mov x0, x20 = =20 ffff800080305838: 52800001 mov w1, #0x0 = // #0 =20 ffff80008030583c: 94001847 bl ffff80008030b958 <__free_pa= ges> =20 ffff800080305840: 11000673 add w19, w19, #0x1 = =20 ffff800080305844: b9402ea0 ldr w0, [x21, #44] = =20 ffff800080305848: f94012a1 ldr x1, [x21, #32] = =20 ...... ffff80008030588c: d50323bf autiasp = =20 ffff800080305890: d65f03c0 ret = =20 ffff800080305894: f9400800 ldr x0, [x0, #16] = =20 ffff800080305898: 17ffffdf b ffff800080305814 =20 ffff80008030589c: a90363f7 stp x23, x24, [sp, #48] =20 Thanks Peng. =20